The USA was apparently close to shooting down one of the planes on September 11th. They talked of even ramming the planes and then ejecting. If that would have been the command, I wonder how the pilots would have felt. They would be taking the lives of people who of course did nothing wrong to save others who did nothing wrong. I know that would probably be very difficult on them afterwards. Some of our soldiers that suffer from PTSD are proof that taking life is not easy. So I can only imagine if that would have happened how they might have felt.